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Совместное влияние магнитного поля и спин-поляризованного тока на переключение полярности магнитных вихрей в спин-трансферном наноосцилляторе
Письма в Журнал технической физики. 2022. Т. 48. № 15. С. 33–36.
Language:
Russian
Keywords: магнитный вихрьмагнитные нанодискиmagnetic nanodiscспин-трансферный наноосцилляторmagnetic vortexspin-transfer nano-oscillator
Publication based on the results of:
Shilov A. L., Elesin L., Kravtsov M. et al., Nature Communications 2026 Vol. 17 No. 1 Article 9734
Identifying the microscopic processes limiting conductivity is essential for understanding correlated quantum materials. In twisted bilayer graphene, metallic resistivity follows ρ ~ Tα with widely varying α, fueling competing interpretations from phonon-limited transport and umklapp scattering to strange metallicity and heavy-fermion renormalization. Here, we use terahertz excitation to selectively heat electrons while keeping the lattice cold, separating ...
Added: September 20, 2026
Копьев А., JETP Letters 2026 Vol. 123 No. 5 P. 310–316
The incompressible three-dimensional Euler equations develop very thin pancake-like regions of exponen tially increasing vorticity. The characteristic thickness of such regions decreases exponentially with time, while the other two dimensions do not change considerably, making the flow near each pancake strongly anisotropic. The pancakes emerge in increasing number with time, which may enhance the anisotropy ...
Added: September 18, 2026
Дюканов П. А., Kozhukhov M., Popov D. et al., Электронная техника. Серия 3: Микроэлектроника 2026 Т. 201 № 1 С. 28–34
The paper presents the results of device and process modeling of bipolar transistors on a silicon - silicon oxide - silicon structure. A comparison of the output characteristics of the models and transistor samples showed the high accuracy of the developed model. To improve the performance of eld-e ect transistors with a control p-n-junction, design ...
Added: September 17, 2026
Захаров А. В., Düven H., Capar M. I., Physics Letters A 2026 No. 576 Article 131388
Molecular dynamics simulations were carried out to study the structural properties of nematic pentyl
cyanobiphenyl (5CB) and pentyloxy cyanobiphenyl (5OCB) liquid crystals (LCs) doped with gold nanoparti
cles (GNPs) of different numbers, shapes and sizes. The spherical GNPs of two different radii and rod-like have
been doped in 5CB and 5OCB cyanobiphenyl liquid crystals. In order to describe ...
Added: September 17, 2026
Andreev D. V., Kornev S. A., Bondarenko G.G. et al., Inorganic Materials: Applied Research 2026 Vol. 17 No. 5 P. 1226–1230
Comparative studies are carried out to investigate high-field charge degradation effects in the gate
dielectric of metal—insulator—semiconductor (MIS) structures with aluminum and polysilicon gates.
Charging phenomena in MIS structures are explored using high-field electron injection into the dielectric
under conditions of gradually increasing voltage current density, with periodic short-term switching to a measurement
mode at a constant low injection ...
Added: September 15, 2026
Poddiakov A., / Series Social Science Research Network "Social Science Research Network". 2026. No. 7437658.
Clarity of knowledge and reasoning is necessary in many cases. Yet vagueness in scientific thinking related to surprise, curiosity, "ability to engage with not-knowing" (de Freitas) and abductive reasoning is also a crucially important source of scientific creativity which supplements combinatorial logic when dealing with the already known. Starting from studies by C. S. Peirce ...
Added: September 15, 2026
Water confined in heterogeneous clay–quartz pores: Structure and dynamics from atomistic simulations
Glushak A., Tararushkin E., Smirnov G., Colloids and Surfaces A: Physicochemical and Engineering Aspects 2027 Vol. 752 Article 141756
The molecular-scale behavior of water in heterogeneous clay–quartz systems is critical for understanding cementation processes in natural soils and compacted bentonite, which is crucial for oil recovery and nuclear waste disposal barriers construction. Here we investigate how heterogeneity of mixed Na-montmorillonite and α-quartz surfaces affect water structure and dynamics in nanopores of 2.5 to 60 Å ...
Added: September 15, 2026
Bochkin G., Doronin S., Fel’dman E. et al., Lobachevskii Journal of Mathematics 2024 Vol. 45 No. 3 P. 1188–1207
We consider the remote state restoring and perfect transfer of the zero-order coherence matrix (PTZ) in a spin system governed by the XXZ-Hamiltonian conserving the excitation number. The restoring tool is represented by several nonzero Larmor frequencies in the Hamiltonian. To simplify the analysis we use two approximating models including either step-wise or pulse-type time-dependence ...
Added: September 14, 2026
Fel’dman E. B., Lazarev I., Pechen A. N. et al., Quantum Information Processing 2026 Vol. 25 Article 121
We consider the state-restoring protocol based on the controlled interaction of a linear chain with environment through incoherent control by the specially adjusted step-wise time-dependent Lindblad operators. We show that the best restoring result (maximal scale factors in the restored state) corresponds to the symmetrical Lindblad equation. (0, 1)-excitation dynamics is considered numerically, and restoring ...
Added: September 14, 2026
Li S., Hu J., Lazarev I. et al., Annals of Physics 2026 Vol. 494 Article 170618
The distribution of entanglement is a crucial task for quantum communication towards realizing a globe-spanning quantum internet. Recently, a protocol for deterministic long-distance distribution of macroscopic entanglement over a network of ensembles of qubits was introduced (Pyrkov et al., 2025). It was shown that this protocol allows for the propagation of macroscopic amounts of entanglement ...
Added: September 14, 2026
Pyrkov A., Lazarev I., Byrnes T., Advanced Quantum Technologies 2025 Article 2400524
Distributing long-distance entanglement is a fundamental goal that is necessary for a variety of tasks such as quantum communication, distributed quantum computing, and quantum metrology. Currently quantum repeater schemes typically aim to distribute one ebit at a time, the equivalent of one Bell pair's worth of entanglement. Here, a scheme is presented to distribute a ...
Added: September 14, 2026
I. D. Lazarev, Narozniak M., Byrnes T. et al., Physical Review A: Atomic, Molecular, and Optical physics 2025 Vol. 111 No. 012416 Article 012416
Unsupervised machine learning is one of the main techniques employed in artificial intelligence. We introduce an algorithm for quantum-assisted unsupervised data clustering using the self-organizing feature map, a type of artificial neural network. The complexity of our algorithm scales as 𝑂(𝐿𝑁), in comparison to the classical case which scales as 𝑂(𝐿𝑀𝑁), where 𝑁 is the ...
Added: September 14, 2026
Борщевский А. Я., Physical Chemistry Chemical Physics 2025 Vol. 27 No. 9 P. 4793–4803
Through the consistent application of quantum statistical thermodynamics, functions of isothermal mixing of real rarefied gases and quantum gases in states of varying degrees of degeneracy are obtained. The reasons for the emergence and resolution of the “Gibbs paradox” and other “paradoxes” are analyzed. Numerical calculations of entropy and pressure jumps were performed using the ...
Added: September 14, 2026
D.L. Gurina, Fashchevsky K. A., Oparin R. D. et al., Surfaces and Interfaces 2026 Vol. 98 Article 110545
In this work, we combine experimental characterization and molecular dynamics (MD) simulations to elucidate the molecular mechanisms governing the impregnation of mefenamic acid (MFA) into nanocrystalline cellulose (NCC) aerogels. NCC aerogels were impregnated with MFA in scCO2, and low-temperature nitrogen adsorption revealed a concentration-dependent decrease in surface area, pore volume, and pore size, with an ...
Added: September 8, 2026
Huang D., Chen Y., Luo X. et al., Chinese Journal of Physics 2026 Vol. 103 P. 1803–1814
Using self-consistent Bogoliubov-de Gennes calculations for kagome flakes framed by armchair
and flat edges, we observe a configuration-dependent spatial inhomogeneity of an 𝑠-wave superconducting
condensate. Specifically, at half-filling, the local pair potential is significantly enhanced
by up to 77.8% at edge centers and up to 148.9% at corners, subsequently boosting their
local critical temperatures by up to 13.5% and ...
Added: September 7, 2026
P. M. Marychev, A. A. Shanenko, Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 No. 7 Article 074509
We investigate the effect of weak interband impurity scattering on the intertype (IT) domain between type-I and type-II superconductivity in diffusive two-band superconductors. Our results show that the significant broadening of the IT domain with increasing band diffusivity ratio, previously established in the absence of interband scattering, persists under weak interband scattering. However, depending on ...
Added: September 7, 2026
Denis K., Н. Новгород: Нижегородский государственный университет им. Н.И. Лобачевского, 2025.
В учебном пособии излагаются элементы теории и описание избранных экспериментальных результатов, полученных в активно развивающейся физике топологических изоляторов. Рассмотрены наиболее простые модели поверхностных и краевых состояний в двумерных и трёхмерных топологических изоляторах, их структура в магнитном поле, а также основы топологических методов для определения их свойств. Обсуждаются модели квантовых точек, формируемых в топологических изоляторах. Приведены ...
Added: September 6, 2026
Екомасов Е. Г., Нерадовский Д. Ф., Фахретдинов М. И. et al., Челябинский физико-математический журнал 2025 Т. 10 № 2 С. 227–235
The effect of the thickness of a non-magnetic layer and the magnitude of the spin-polarized current on the coupled dynamics of two magnetic vortices in a spin-transfer nanoscillator is investigated. A spin-transfer nanoscillator in the form of a three–layer conductive cylinder with a diameter of 200 nm is considered. The features of the dynamics of ...
Added: September 28, 2025
Екомасов Е. Г., Нерадовский Д. Ф., Pugach N. et al., Известия Уфимского научного центра РАН 2025 № 1 С. 55–60
The coupled dynamics of magnetic vortices in spin-transfer nanooscillators is investigated. A spin-transfer nanooscillator is a structure in which the precession of magnetization is excited due to the effect of spin moment transfer between the spin-polarized current and magnetization. The case of a spin-transfer nanooscillator, which is a three-layer nanocylinder, where two magnetic layers are ...
Added: September 28, 2025
Антонов Г. И., Екомасов Е. Г., Звездин К. А. et al., Физика металлов и металловедение 2024 Т. 125 № 1 С. 39–46
The influence of a large spin-polarized current on the coupled dynamics of vortices in spin-transfer
nanooscillators with a diameter of 400 nm is investigated. New stationary modes of coupled oscillations
of vortices have been discovered, both for the same and opposite polarities of their cores. The dependence of
the frequency of stationary coupled oscillations of magnetic vortices on ...
Added: November 30, 2024
Екомасов Е. Г., Степанов С. В., Назаров В. Н. et al., Письма в Журнал технической физики 2021 Т. 47 № 17 С. 26–28
The joint effect of a spin-polarized current and an external magnetic field on the magnetization
dynamics in vortex spin-transfer nano-oscillators 400 nm in diameter has been investigated. The coupled
dynamics of magnetic vortices has been calculated numerically using the SpinPM software package for
micromagnetic simulation. The dependence of the frequency of stationary coupled vortex oscillations on the
magnetic field, ...
Added: March 26, 2022
Екомасов Е. Г., Степанов С. В., Звездин К. А. et al., Физика металлов и металловедение 2021 Т. 122 № 3 С. 212–220
Исследована структура и динамика намагниченности в вихревом спин-трансферном наноосцилляторе, который представляет собой трехслойный спин-вентильный магнитный наностолбик большого диаметра – 400 нм, при протекании через него спин-поляризованного тока. С помощью микромагнитного моделирования было исследовано динамическое изменение структуры вихрей, траектории их движения в зависимости от величины спин-поляризованного тока. Показана возможность существования различных режимов движения вихрей: затухающие осцилляции ...
Added: April 20, 2021